Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2004 Chevrolet Avalanche 2500FACTORY OEM SERVICE PROCEDURE
Removal Procedure
- Remove the rear fuel tank. Refer to Fuel Tank Replacement (Front Tank) or Fuel Tank Replacement (Rear Tank) .
- Remove the ground wire harness bolt.
- Reposition the ground wire and fill pipe ground strap.
- Open the rear axle vent hose clip at the fill pipe and remove the vent hose.
- Loosen the fuel tank fill hose clamp at the front tank.
- Disconnect the fuel fill hose vent line quick connect fitting from the tank. Refer to Quick Connect Fitting(s) Service (Plastic Collar) .
- Remove the fill hose from the front tank.
- Remove the fuel fill hose/pipe assembly.
- Cap the open end of the front fuel tank to prevent system contamination.
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.